Abstract
Objectives : Written by Yoongdongri in the 18th century Chosun, Chochangkyeul is a book that specially deals in Ungi. Yoon understood a person's body constitution by taking into factor the person's birth year, and used this information to determine his Ungi type, and understood his disease mechanism. Methods : Following the study on the first part of Chochangkyeul, named Ungiyeonron, the paper tries to study the book's second part, called Yongyakgwon. The book's core messages are summarized upon a thorough inspection. Results & Conclusions : Yoondongri was a highly-acclaimed doctor in the 18th century Chosun, and also an Ungi practitioner who utilized the theory of Ungi in his clinical practices. His practices were mainly based on the prescription of Ungi found in Chenwuze's Sanyinfang, coupled with almost all parts of Donguibogam's Husebang. He had an extensive clinical experience which helped him describe his methods of quickly responding to the side effects that sometimes occur due to misuse of medicine. Such detailed descriptions are never found in past medical books, which gives Yoon's book a great level of historical importance. Yongyakgwon divides the scripts between Gabsin, Muui, Byungye, Gyungjeong, and Yimgi in accordance with the theory of Ounhabgi, and also introduces treatments based on Yukisachun. Jangbupasuyak also introduces about six external organs and six internal organs with relation to treating wind medicine, treating heat medicine, treating cold medicine, treating dry dampness medicine, dryness-moistening medicine, pulling meridian medicine. All of these can be applied to patients easily.
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